|QI - BBC2, Friday, 10PM|
The Chase (ITV1, 5pm) Series 4 of the general knowledge gameshow. Hosted by Bradley Walsh.
Ground Zero Mosque (Channel 4, 8pm) Documentary about the story of a proposed mosque two blocks away from the scene of the 9/11 World Trade Center attacks.
Royal Navy: Submarine Mission (Channel 5, 8pm) Documentary about the HMS Turbulent and its crew. (1/3)
PICK OF THE DAY The Real Hustle: New Recruits (BBC3, 8.30pm) Return of the scams and cons series, with two new presenters in Polly Parsons & Jazz Lintott.
How Facebook Changed The World: The Arab Spring (BBC2, 9pm) Documentary about how modern technology played a part in Middle Eastern revolutions started by the younger generations.
9/11: Emergency Room (Channel 4, 9pm) Documentary about the work of the emergency services during 9/11.
Hollyoaks Later (E4, 10pm) Series 4 of the late-night version of soap Hollyoaks. (1/5)
Jamie's Kitchen Australia (Good Food, 10pm) Reality show where popular chef Jamie Oliver tries to start one of his successful restaurants, that only employ disadvantaged youths, in Australia.
Adopting Abroad: Saira's Story (BBC2, 9pm) Documentary on Apprentice star Saira Khan's attempt to adopt a girl from a Pakistan orphanage. Concludes Thursday. (1/2)
Don't Tell The Bride (BBC3, 9pm) Series 5 of the wedding series where the groom organized the ceremony in secret. (1/13)
Mercury Prize: Live (BBC2, 10pm) Coverage of the music ceremony at the Grosvenor House Hotel, where one of 12 nominees will win the prestigious Mercury Award. Presented by Lauren Laverne.
PICK OF THE DAY The Twins Of The Twin Towers (BBC2, 10.35pm) Documentary featuring accounts from various twins involved in the 9/11 atrocity.
Natural World: Animal House (BBC2, 8pm) Wildlife documentary on animals that build structures. Narrated by Sir David Attenborough.
Storyville: Law Of The Dragon (BBC4, 8.30pm) Documentary series, beginning with a look at the work of a mobile Chinese court that travels to remote areas of the country. (1/4)
PICK OF THE DAY Bin Laden: Shoot To Kill (Channel 4, 9pm) Documentary on the successful secret mission to kill Osama Bin Laden, featuring an interview with President Obama.
Claire Richards: Slave To Food (Sky Living, 9pm) Documentary on ex-popstar Claire Richards and her battle with her weight.
9/11: The Conspiracy Road Trip (BBC3, 9pm) Documentary on the various conspiracy theories that surround 9/11. Presented by comedian Andrew Maxwell.
PICK OF THE DAY Happy Endings (E4, 9.30pm) Season 1 of the US comedy about four friends who are divided when one of them is jilted by his bride-to-be. Starring Eliza Coupe, Elisha Cuthbert, Zachary Kingdom, Adam Pelly & Damon Wayons Jr. (1/15)
Mock The Week (BBC2, 10pm) Series 10 of the satirical panel show continues. (7/12)
Question Time (BBC1, 10.35pm) Return of the political Q&A series, beginning with a special on 9/11. Presented by David Dimbleby.
Big Brother 2011: Live Launch (Channel 5, 9.30pm) Following the end of the three-week celebrity edition, this year's regular Big Brother begins.
PICK OF THE DAY QI (BBC2, 10pm) Series 9 (or Series I) of the trivia comedy panel show. Hosted by Stephen Fry. (1/16)
PICK OF THE DAY Operation Crossbow (ITV1, 8pm) Documentary on Spitfire pilots and Allied technicians who helped thwart the Nazis during WWII.